<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.moveBox{
				text-align: center;
				font-weight: bold;
				font-size: large;
				width: 100px;
				height: 100px;
				background-color: brown;
				border-radius: 100px;
			
				animation: moveBox 1s infinite;
				animation-direction:alternate;
				position: relative;
			}
			@keyframes moveBox{
				from{
					left: 1px; 
				}
				to{
					left: 500px;
				}
			}
		</style>
	</head>
	<body>
		<h3>移动方块动画效果</h3>
		
		<div class="moveBox">i'm your farther</div>
	</body>
</html>
